99941321531 has 4 divisors (see below), whose sum is σ = 99944357232. Its totient is φ = 99938285832.

The previous prime is 99941321461. The next prime is 99941321549. The reversal of 99941321531 is 13512314999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99941321531 is a prime.

It is a super-3 number, since 3×99941321531³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99941321231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1467920 + ... + 1534493.

It is an arithmetic number, because the mean of its divisors is an integer number (24986089308).

Almost surely, 2^99941321531 is an apocalyptic number.

99941321531 is a deficient number, since it is larger than the sum of its proper divisors (3035701).

99941321531 is a wasteful number, since it uses less digits than its factorization.

99941321531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3035700.

The product of its digits is 262440, while the sum is 47.

The spelling of 99941321531 in words is "ninety-nine billion, nine hundred forty-one million, three hundred twenty-one thousand, five hundred thirty-one".